Barbecue grill



FIG. 1 is a right, front and top perspective view of a barbecue grill showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear side view thereof; and,

FIG. 6 is a right side view thereof. 

I claim the ornamental design for a barbecue grill, as shown and described. 